US5139239A - Lining of molten metal handling vessels - Google Patents

Lining of molten metal handling vessels Download PDF

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Publication number
US5139239A
US5139239A US07/745,248 US74524891A US5139239A US 5139239 A US5139239 A US 5139239A US 74524891 A US74524891 A US 74524891A US 5139239 A US5139239 A US 5139239A
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US
United States
Prior art keywords
lining
permanent
vessel
slurry
molten metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/745,248
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English (en)
Inventor
Kenneth T. Eccleston
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Foseco International Ltd
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Foseco International Ltd
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Filing date
Publication date
Application filed by Foseco International Ltd filed Critical Foseco International Ltd
Application granted granted Critical
Publication of US5139239A publication Critical patent/US5139239A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/02—Linings

Definitions

  • the invention provides a method of forming an expendable lining in a molten metal handling vessel having an outer metal casing lined with a relatively permanent lining, in which portions of the surface of the permanent lining are covered with a removable material, a slurry of refractory material is applied over both the removable material and the remaining exposed surface of the permanent lining, the slurry is dried to form the expendable lining and the removable material is removed to leave gaps between the expendable lining and the permanent lining, the gaps providing vent channels for gases.
  • the gaps act as venting means during further drying and use of the vessel with attendant advantages as discussed in more detail below.
  • the consumable layer may be held in place against the permanent lining by clips or adhesion pads or any other convenient means.
  • the invention provides a molten metal handling vessel having an outer metal casing lined with a relatively permanent lining and an inner expendable lining formed from a slurry of refractory material directly adhered to the permanent lining at a number of locations and separated from the permanent lining at other locations by air gaps which provide vent channels for gases.
  • Drying of the sprayed lining can take a relatively long time and this can result in insufficient drying and unwanted moisture remaining in the expendable lining.
  • De-sculling of the vessel can be troublesome because of the direct attachment over substantially the whole surface area of the permanent lining. This can lead to damage of the permanent lining which then requires repair.
  • Drying and pre-heating can be quicker and more uniform in effect and gases generated from the expendable lining will be provided with a more direct route to the atmosphere via the vent channels provided by the air gaps resulting in reduced gas build up in the shell of the vessel. Improved thermal insulation is also provided. De-sculling is simplified due to the reduced contact between the linings.
  • the expendable linings of the invention are preferably of thickness from 20 to 50 mm including the portions contacting the permanent lining.
  • the air gaps between the permanent and expendable linings are preferably from 3 to 20 mm thick when consumable layers have been used, i.e. corresponding to the use of consumable layers of that thickness.
  • bigger gaps may be formed where re-usable formers are used, or indeed, where a hollow consumable layer is used.
  • gaps of 200 mm or higher thickness may be employed.
  • the gaps may be filled with a coarse particulate material to provide support for the expendable lining.
  • larger gaps may be utilised while the nature of the particulate filling still enables adequate venting to take place.
  • FIG. 1 is a perspective view with parts cut away of a portion of a tundish lined according to one embodiment of the invention.
  • FIG. 2 is a plan view of a board suitable for use as a consumable layer according to another embodiment of the invention.
  • FIG. 6 is a perspective view with parts cut away of a portion of a tundish lined using re-usable formers
  • FIG. 7 is a similar view of FIG. 6 but showing an embodiment utilising recesses formed in the permanent lining
  • FIG. 8 is a vertical sectional view of a reusable former in a sleeve of refractory material.
  • FIG. 1 illustrates an embodiment in which strips of consumable board are applied in spaced rows over the permanent lining of a tundish.
  • the metal casing 10 of a tundish has a permanent lining 11 of monolithic construction.
  • Strips 12 of consumable board are attached in rows to the monolithic lining 11.
  • An expendable lining 13 is formed by spraying an aqueous slurry of refractory material over the strips 12 and over the permanent lining 11 between the strips 12 and then drying.
  • the expendable lining 13 has a stepped inner surface 14 to contact molten metal in the tundish and fills the gaps 15 that lie between the strips 12.
  • Strips 12 are burned out during pre-heating of the tundish to about 600° C. and leave corresponding air gaps (not shown) in the form of vertical channels between permanent lining 11 and expendable lining 13.
  • a board 20 of, say, corrugated cardboard is provided with a plurality of holes 21 through its thickness.
  • This board is then attached to the permanent lining of a tundish and a layer of aqueous slurry of refractory material is sprayed over the board. The layer so deposited is then dried and the tundish heated to burn out the board 1.
  • the resulting construction is shown in FIG. 3.
  • the metal casing 22 of a tundish has a permanent lining 23 of monolithic construction, known per se in the art.
  • Over the permanent lining 23 is an expendable lining 24 formed from the sprayed-on slurry of refractory material. Lining 24 contacts and adheres to permanent lining 23 at locations 26 that correspond to the holes 21 in the consumable board 20.
  • Interconnected air gaps 25 between expendable lining 24 and permanent lining 23 correspond to the body of board 20 that is burned out and provide vent channels for escape of gas.
  • the board with holes through may be applied in strip form with gaps between the strips.
  • FIG. 6 illustrates an embodiment in which re-usable formers are positioned on to the permanent lining of a tundish.
  • the metal casing 60 of a tundish has a permanent lining 61 of monolithic construction.
  • a series of re-usable formers of which two, 62 and 63 are shown, is positioned against lining 61 to form a spaced row of vertically-extending removable strips.
  • the formers taper so that they are wider adjacent the top of lining 61 and narrower at their lower ends when positioned in the tundish. This renders their extraction easier.
  • An expendable lining 64 is formed by spraying an aqueous slurry of refractory material over the formers and over the permanent lining between the formers and then drying. The formers can then be removed to leave vent channels between permanent lining 61 and expendable lining 64.
  • Former 63 is shown having been removed to leave vent channel 65 whereas former 62 is shown only partially extracted.
  • This sleeved former is placed vertically against the face of a permanent lining 82 of a tundish having a metal casing 83.
  • a series of such sleeved formers is used spaced along the inside walls of the lined tundish. The walls are then sprayed as described above to form an expendable lining 84.
  • the formers are removed to leave cavities or vent channels 85 lined with the refractory sleeves 81 as shown in FIG. 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Coating With Molten Metal (AREA)
US07/745,248 1990-08-18 1991-08-14 Lining of molten metal handling vessels Expired - Fee Related US5139239A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB909018205A GB9018205D0 (en) 1990-08-18 1990-08-18 Lining of metallurgical vessels

Publications (1)

Publication Number Publication Date
US5139239A true US5139239A (en) 1992-08-18

Family

ID=10680918

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/745,248 Expired - Fee Related US5139239A (en) 1990-08-18 1991-08-14 Lining of molten metal handling vessels

Country Status (5)

Country Link
US (1) US5139239A (de)
EP (1) EP0472346B1 (de)
AT (1) ATE128395T1 (de)
DE (1) DE69113371D1 (de)
GB (1) GB9018205D0 (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5358551A (en) * 1993-11-16 1994-10-25 Ccpi, Inc. Turbulence inhibiting tundish and impact pad and method of using
US5360200A (en) * 1992-07-28 1994-11-01 Foesco International Limited Lining of molten metal handling vessel
US5507474A (en) * 1994-01-13 1996-04-16 Minerals Technologies, Inc. Lining for molten metal handling vessles
USRE35685E (en) * 1992-02-07 1997-12-09 Bethlehem Steel Corporation Impact pad for a continuous caster tundish
US20040041312A1 (en) * 2002-09-04 2004-03-04 Connors Charles W Tundish impact pad
US20050235598A1 (en) * 2001-10-23 2005-10-27 Andrew Liggins Wall construction method
WO2006030319A3 (en) * 2004-09-14 2006-06-08 North Cape Minerals As Method of manufacturing wear linings for casting ladles and tundishes
US20110140318A1 (en) * 2009-12-10 2011-06-16 Reeves Eric W Molten metal containment structure having flow through ventilation
US8257645B2 (en) 2010-04-12 2012-09-04 Arcelormittal Investigacion Y Desarrollo, S.L. Insulation brick
WO2018038983A1 (en) * 2016-08-24 2018-03-01 Vesuvius Crucible Company Metallurgical vessel lining with enclosed metal layer
KR20210042316A (ko) 2018-08-10 2021-04-19 니타 가부시키가이샤 Ｉｃ 태그
US11440089B2 (en) 2017-08-29 2022-09-13 Vesuvius Usa Corporation Refractory lining structure

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2112581A1 (de) * 1971-03-16 1972-09-28 Plibrico Co Gmbh Feuerfeste Wandkonstruktion
GB1364665A (en) * 1971-12-07 1974-08-29 Foseco Trading Ag Tundishes
US4076224A (en) * 1976-04-07 1978-02-28 Foseco Trading A.G. Tundishes
GB1537739A (en) * 1976-12-07 1979-01-04 Foseco Trading Ag Molten metal handling vessels
US4222522A (en) * 1976-04-19 1980-09-16 Kurosaki Refractories Co., Ltd. Apparatus for applying refractory material onto the inner surface of a furnace
GB2080505A (en) * 1980-07-12 1982-02-03 Foseco Trading Ag Composite Refractory Slabs for Lining Tundishes
GB2104633A (en) * 1981-06-15 1983-03-09 Robson Refractories Limited Tundish
US4422625A (en) * 1982-02-23 1983-12-27 Fmc Corporation Foundry pouring ladle protective liner
US4779798A (en) * 1987-05-07 1988-10-25 National Refractories & Minerals Corporation Gunning apparatus
EP0180388B1 (de) * 1984-11-01 1989-12-27 Foseco International Limited Behälter für geschmolzenes Metall

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5732857A (en) * 1980-07-12 1982-02-22 Foseco Trading Ag Tundish
US5036029A (en) * 1989-04-28 1991-07-30 Consolidated Ceramic Products, Inc. Sprayable insulating liner compositions for metal vessels

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2112581A1 (de) * 1971-03-16 1972-09-28 Plibrico Co Gmbh Feuerfeste Wandkonstruktion
GB1364665A (en) * 1971-12-07 1974-08-29 Foseco Trading Ag Tundishes
US4076224A (en) * 1976-04-07 1978-02-28 Foseco Trading A.G. Tundishes
US4222522A (en) * 1976-04-19 1980-09-16 Kurosaki Refractories Co., Ltd. Apparatus for applying refractory material onto the inner surface of a furnace
GB1537739A (en) * 1976-12-07 1979-01-04 Foseco Trading Ag Molten metal handling vessels
GB2080505A (en) * 1980-07-12 1982-02-03 Foseco Trading Ag Composite Refractory Slabs for Lining Tundishes
GB2104633A (en) * 1981-06-15 1983-03-09 Robson Refractories Limited Tundish
US4422625A (en) * 1982-02-23 1983-12-27 Fmc Corporation Foundry pouring ladle protective liner
EP0180388B1 (de) * 1984-11-01 1989-12-27 Foseco International Limited Behälter für geschmolzenes Metall
US4779798A (en) * 1987-05-07 1988-10-25 National Refractories & Minerals Corporation Gunning apparatus

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE35685E (en) * 1992-02-07 1997-12-09 Bethlehem Steel Corporation Impact pad for a continuous caster tundish
US5360200A (en) * 1992-07-28 1994-11-01 Foesco International Limited Lining of molten metal handling vessel
US5358551A (en) * 1993-11-16 1994-10-25 Ccpi, Inc. Turbulence inhibiting tundish and impact pad and method of using
US5507474A (en) * 1994-01-13 1996-04-16 Minerals Technologies, Inc. Lining for molten metal handling vessles
US20050235598A1 (en) * 2001-10-23 2005-10-27 Andrew Liggins Wall construction method
US20040041312A1 (en) * 2002-09-04 2004-03-04 Connors Charles W Tundish impact pad
US6929775B2 (en) 2002-09-04 2005-08-16 Magneco/Metrel, Inc. Tundish impact pad
US20100166951A1 (en) * 2004-09-14 2010-07-01 North Cape Minerals As Method for manufacturing wear linings for casting ladles and tundishes
WO2006030319A3 (en) * 2004-09-14 2006-06-08 North Cape Minerals As Method of manufacturing wear linings for casting ladles and tundishes
US20110140318A1 (en) * 2009-12-10 2011-06-16 Reeves Eric W Molten metal containment structure having flow through ventilation
US8883070B2 (en) * 2009-12-10 2014-11-11 Novelis Inc. Molten metal containment structure having flow through ventilation
US8257645B2 (en) 2010-04-12 2012-09-04 Arcelormittal Investigacion Y Desarrollo, S.L. Insulation brick
US8894923B2 (en) 2010-04-12 2014-11-25 Arcelormittal Investigacion Y Desarrollo, S.L. Insulation brick
WO2018038983A1 (en) * 2016-08-24 2018-03-01 Vesuvius Crucible Company Metallurgical vessel lining with enclosed metal layer
KR20190038927A (ko) * 2016-08-24 2019-04-09 베수비우스 유에스에이 코포레이션 에워싸는 금속 층을 갖는 야금 용기 라이닝
US10989473B2 (en) 2016-08-24 2021-04-27 Vesuvius U S A Corporation Metallurgical vessel lining with enclosed metal layer
US11440089B2 (en) 2017-08-29 2022-09-13 Vesuvius Usa Corporation Refractory lining structure
KR20210042316A (ko) 2018-08-10 2021-04-19 니타 가부시키가이샤 Ｉｃ 태그

Also Published As

Publication number Publication date
EP0472346B1 (de) 1995-09-27
ATE128395T1 (de) 1995-10-15
DE69113371D1 (de) 1995-11-02
GB9018205D0 (en) 1990-10-03
EP0472346A1 (de) 1992-02-26

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Effective date: 19960821

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362